Grinding and polishing machine.



E. L. FRENGH & G. W. STEPHENSON. GRINDING AND romsnme MACHINE.

APPLICATION FILED MAY 16, 1911- Win/1853 6 m t/vr R! Qv W fi %By I I I A'r'romvsx 'without removing this surface.

QEDMUND I.. runner: ANDGEORGE, w. STEPHENSON, OE SYRACUSE, N W vonmassrenons r0 CRUCIBLE STEEL COMPANY OE AMERICA, OF rrr'rsnunen, PENNSYL- VANIA, A coarona'rron or NEW JERSEY.

GRINDING AllTD POLISHING MACHIlN'E.

To all whom it may concern Be it lmown that we, EDMUND L. FRENCH and GEORGE W. SrErHEN'soN, of Syracuse,

New York, have invented new and useful Improvements in Grinding and Polishing Machines, of which the following, taken m connection with the accompanying draw ings, is a full, clear, and exact description.

This invention relates to certain improvements in machines for grinding, sizing and polishing round bars or rods after having been previously rolled or drawn to approximate predetermined diameter.

It is well known that the process of manufacture of round iron or steel bars or rods by rolling or\ drawing leaves a relatively thin surface or skin of more or less uncertain density. or homogeneity and thereby renders the stockunsuitable for many uses This is usually done by turningin order to produce the desired uniformity of size or diam eter but the turning process is not only ex-v tremely 'slow, laborious and expensive but in many instances is found to be impracti cable in establishing exact uniformity of size throughout the length of the rod or bar owing to the tendency of the rod or bar to vibrate or spring under pressure of the turning tool.

- The object, therefore, of our present in- 1 vention is to provide simple, practical and efficient means whereby this skin or irregular surface may be quickly and economically removed and the rod or bar brought to an exact predetermined size throughout its length, by means of a rotary grinding or polishing action asdistinguished from turning. In other words, we havesought to provide means whereby the grinding or polish-- ing elements perform the double function of rotating and feeding the rod endwise throughout its entire length and also of reducing it to a uniform size or diameter; a all points.

Other objects and uses will be brought out,

in the] following description.

In the drawingsFigures 1 and 2are re spectively atop plan and a side elevationof a rod-grinding and sizing machine embodying the various features of our invention. Fig. 3 is a transverse vertical sectional view between the grindingelemen'ts taken on line Patented Sept. 22, 1914.. Ser1a1No.627,585.

3 3 Fig. 1. Fig. 4 is a horizontal sectional v ew through the grmding elements showing more partlcularly their lines of contact with the rod. Fig. 5 is a transverse sectional view through the rod and its supporting rest showing the lines of con act of the grinding members therewith.

In carrying out the Objects stated, we provide a pair of opposed coacting grinding or.

to be ground or polished and are preferably mounted for rotary movement in or upon separate face plates or circular heads -3 and whlch in turn are secured to separate rotary shafts 5 and 6. These shafts are arranged end to end in different horizontal planes at an angle to each other and are jou'rnaled in. bearings -7 and 8 on separate supporting brackets '-9-- and l0' which in turn are adjustably mounted upon a supporting bed 11- as best seen in Fig. 2. The bracket 9- with lts shaft 5- is adjustable horizontally about'the axis of a pivotal bolt 12 to vary the horizontal angle betweenthe meeting faces of the disks 1- and,-2 and is adapted to be held in its adjusted position by a clamping bolt 13 which passes through a slot -14-- in the bed 1l'-. The bracket; 10- with its shaft 6 is adjustable endwise or horizontally toward and from the disk 1 by means of a screw -15 to vary the intervening opening or space between said disks according to the size or diameter ofthe rod which it is desired to produce, said bracket being held in its adjusted position by means of a clamping bolt -l6- 17 in the base or bed 11. The shaft 6 is disposed in a horizontal plane slightly below that of the shaft 5- for a purpose hereinafter described and is provided with a pulley --18-. adapted to be driven from any available source of power for rotating the grinding or polishing disk 2- at a comparatively highrate of speed, in this instance about fifteen hundred revolutions per minute, in-the direction indicated by arrow :0. The shaft 5-. is provided with a relatively large ulley l9'- adapted to be drivenby a belt or other power passing through a slot transmitting mechanism-from the same or different source of power to drive the disk 1-= at a relatively low rate of speed in the opposite directionindicated by arrow '3 These disks *1- and 2- are preferably but not necessarily of the-same diameter and are rigidly secured in recesses in the adjacent faces of their respective disks 3--- and 4.' by any suitable fastening means,

as, for .example, soft lead or solder.

A guide rest --'extends in a substantiallyhorizontal plane betweenthe meeting faces of the disks -1 and 2 just be lowtheir centers or axes and is'supported at its ends upon front and rear brackets .21- and 2.2 which are located directlyin front and at the rear of the disks,

. intervening space and is disposed centrally therein so as to clear the meeting faces of the disks and at the same time sup ort the rod -a at all points across the iameter 8010f the disks.

Mounted in the upper ends of the bracket 22. above the guide rest -20-+ are additional guide members -24:- which are held in place by set screws -25' and serve to $6 isteady the bar in its longitudinal movement through the machine.

The meeting faces of the grinding or polishing disks 1 and.2- are slightly convexed or conical "and the disks are adjjusted. so that the portions of themeeting faces at the rear of their axesare substan tially parallel and spaced a distance apart corresponding to the diameter to which the rod orbar zis to be ground or sized and it therefore followsthat the horizontal angle at the intersection of the axes of the shafts -.5 and 6 depends upon the degree of'convexity or conical angle of the meeting faces of the disks when the rear portions of said meeting faces are parallel in the plane of the 'rod a or approximately in the-plane of the upper face of the guide rest -'20 which is slightly below the center of the disks.

Now by rotating the disks --1-- and 2 in opposite directions, one disk as -2 being rotated at'a relatively high-ratelof speed with its rear face traveling downwardly while the rear face of the disk 1 travels upwardly at a relatively low rate of speed, the rod .w resting on the upper face of the bar --20- in contact with the rear parallel portions of the meeting faces of both disks will e rotated in the direction indicated by a ow -z-, Figs. '1 and 3 dc rest serving as a support for a by reason of the'opposed motions of the disks and will also be fed longitudinally or rearwardly by reason of the disposition of the rod slightly below the horizontal 'planes of the axes of said disks and also by reason of its contact with said disks at the rear of said axes which impartsa .spiral feeding action to the rod, thereby grinding the surface of said rod to a uniform diameter throughout its length. v

In operation the rod is placed upon the front end of the guide rest 20 and fed rearwardly and substantially diametrically of said disks until the forward end of the rod is engaged by the meeting faces of the disks at the rear of their axes, whereupon.

the action of the disks upon the rod will automatically rotate andfeed the latter rearwardly against and along the upper face of the guide rest -20 until the entire rod has passed out of the machine, whereupon the operation may be repeated with other rods if desired.

. As previously stated the may be determined by proper adjustment of the disk -2 relatively to the disk '-1- of the rod I through the medium of'theadjusting screw "15 which is adapted to be operated by hand, this adjustment also servingtokeep the disks in proper grinding "and feeding contact'with the rod operated-upon. v

What we claim is: I 1. In a machine for grinding round bars, opposed conical ding disks having radlal portions thereo at the 'rear of their axes substantially parallel, a guide'rest between the disks just below the arallel grinding faces, means for revolving t e disks in reverse! directions and at different speeds, the rear side of the higher speed disk traveland sizing ing downwardly, and means for adjusting one of the disks axially toward and from the other disk.

2. In a machine for grindin and sizinground bars, opposed conical grinding disks having radial portions thereof at the-rear of their axes substantially parallel, a guide rest between the disks just below the parallelv Y 4 grinding faces, means for revolving the disks in reverse directions and at difierent speeds, the rear side of the higher speed disk travelparallel grinding faces, means for revolving the disks in reverse directions and at differ- 'ing downwardly, and means for adjusting. v

entsneeds, the rear side of the higher speed 4. Ina machine for and sizing justing the high speed disk axially and round bars {opposed conical nding disks separate means for adjusting the low speed havingrad al portions thereo at the rear of. disk lengthwise of the rest. their axes substantially parallel, a guide rest In witness whereof we have hereunto set 5 extending continuously from front to rear of our hands this 12th da of May 1911.

and between the disks just below the parallel EDMU D L. FRENCH. grinding faces, means for revolvin the GEO. W. STEPHENSON. disks in reverse directions and at di erent Witnesses:

speeds, the rear side of the higher speed 0. E. OCONNOR, 19 disk traveling downwardly, means for ad- F. F. HARTER. 

